got stuck inside apple mail
My ipad got stuck inside apple mail. I can not get out of it. I can not even power it off (by pressing the top key). But the email works, I can still view email, write email. If I hit the top key, the screen will go dark and I can use the home key to get back to email app or use the camera. I can not do anything else. Does anyone know how to solve the problem.
Thanks in advance.